JPH0632310Y2 - Attachment structure of guide bush for chisel in striking device - Google Patents
Attachment structure of guide bush for chisel in striking deviceInfo
- Publication number
- JPH0632310Y2 JPH0632310Y2 JP11633288U JP11633288U JPH0632310Y2 JP H0632310 Y2 JPH0632310 Y2 JP H0632310Y2 JP 11633288 U JP11633288 U JP 11633288U JP 11633288 U JP11633288 U JP 11633288U JP H0632310 Y2 JPH0632310 Y2 JP H0632310Y2
- Authority
- JP
- Japan
- Prior art keywords
- guide bush
- pin
- chisel
- front cap
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Percussive Tools And Related Accessories (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は打撃装置においてタガネをガイドするガイド
ブツシユの取付構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mounting structure of a guide bush for guiding chisel in a striking device.
油圧あるいは空圧によりシリンダ内のピストンを往復駆
動し、このピストンによりタガネを打撃して主としてコ
ンクリートや岩石などの破砕作業をおこなう打撃装置に
おいては、タガネとこのタガネをガイドするガイドブツ
シユのすきまにコンクリートや岩石の細粒や砂が侵入す
るため、ガイドブツシユは消耗品としてかなりひんぱん
に交換する必要がある。従来このガイドブツシユの取付
構造としては、第１０図に示すようにガイドブツシユ３
１ａおよび３１ｂ（以下ガイドブツシユ３１と総称す
る。）とこれを保持するフロントキヤツプ３２の嵌合部
において、ガイドブツシユ３１の外周面とフロントキヤ
ツプ３２の内周面にそれぞれ断面半円状の環状溝３３お
よび３４を設け、これらの環状溝内に多数個のスチール
ボール３５を挿入したものがある。３６はタガネ、３７
はスチールボールの挿入取出口、３８はプラグである。
ところがこの構造のものでは、ガイドブツシユ３１の交
換時には、スチールボール３５を全部挿入取出口３７か
ら外部へ取出さねばならず、この作業は極めて手間がか
かる。また上下方向の振動や衝撃により環状溝３３およ
び３４が局部的に変形しているので、スチールボール３
５の取出を一層困難にするほか、上記変形によりフロン
トキヤツプ３２とガイドブツシユ３１が固着して抜取り
や新しいガイドブツシユの挿入も困難となることが多
い。そこで第１１図に示すように、前記スチールボール
３５のかわりに、抜止めピン４１を用い、フロントキヤ
ツプ３２に穿設したピン穴４２に挿入した抜止めピン４
１を、ガイドブツシユ３１の外周部に直線状に設けた断
面半円状のピン溝４３に係合させることもおこなわれて
いる。しかしこの構造においても、上下方向の振動や衝
撃によりガイドブツシユ３１が下方へ繰返駆動されるた
め、フロントキヤツプ３２の内周およびガイドブツシユ
３１の外周がピン近傍部において矢印Ｙで示す方向に変
形してしまりばめ状態となるため、ガイドブツシユ３１
の抜取りおよび新しいガイドブツシユの挿入が困難にな
るという問題がある。In a striking device that reciprocally drives a piston in a cylinder by hydraulic pressure or air pressure, and strikes the chisel with this piston to mainly perform crushing work on concrete, rocks, etc., in the clearance between the chisel and the guide bush that guides the chisel, concrete and The guide bushes need to be replaced quite often as a consumable item because fine rock particles and sand enter. Conventionally, as a mounting structure of this guide bush, as shown in FIG.
In the fitting portions of 1a and 31b (hereinafter collectively referred to as guide bushes 31) and the front cap 32 that holds them, an outer circumferential surface of the guide bush 31 and an inner circumferential surface of the front cap 32 have an annular groove 33 having a semicircular cross section. 34, and a large number of steel balls 35 are inserted into these annular grooves. 36 is chisel, 37
Is a steel ball insertion / extraction port, and 38 is a plug.
However, in the case of this structure, when the guide bush 31 is replaced, all the steel balls 35 must be taken out from the insertion take-out port 37, and this work is extremely troublesome. Further, since the annular grooves 33 and 34 are locally deformed due to vertical vibration or impact, the steel ball 3
In addition to making it more difficult to take out 5, the front cap 32 and the guide bush 31 are often fixed due to the above-mentioned deformation, making it difficult to remove and insert a new guide bush. Therefore, as shown in FIG. 11, a retaining pin 41 is used instead of the steel ball 35, and the retaining pin 4 is inserted into a pin hole 42 formed in the front cap 32.
1 is also engaged with a pin groove 43 having a semicircular cross section, which is linearly provided on the outer peripheral portion of the guide bush 31. However, also in this structure, since the guide bush 31 is repeatedly driven downward by vertical vibration and impact, the inner circumference of the front cap 32 and the outer circumference of the guide bush 31 are deformed in the direction indicated by the arrow Y near the pin. Guide bushing 31
There is a problem in that it is difficult to remove and insert a new guide bush.
この考案は上記従来の問題点を解決するもので、ガイド
ブツシユの交換が容易な打撃装置におけるタガネ用ガイ
ドブツシユの取付構造を提供しようとするものである。This invention solves the above-mentioned conventional problems, and aims to provide a guide bush attachment structure for a chisel in a striking device in which the guide bush can be easily replaced.
しかしてこの考案のガイドブツシユの取付構造は、流体
圧により駆動されるピストンを内蔵したシリンダと、こ
のシリンダの下部に取付けられタガネを往復自在に保持
するフロントキヤツプとをそなえ、前記ピストンにより
前記タガネを打撃して被破砕物の破砕をおこなう打撃装
置において、前記タガネをガイドするガイドブツシユ
を、前記フロントキヤツプに設けた取付穴に挿脱自在に
嵌込み、前記フロントキヤツプに穿設したピン穴に抜止
めピンを挿入して、この抜止めピンを前記ガイドブツシ
ユの外周部に設けた断面半円状のピン溝に係合させると
ともに、前記ピン溝の少なくとも上部側に、該ピン溝に
連続する逃がし溝を設け、前記ピン穴が前記取付穴の内
壁面に開口して形成した開口部の少なくとも下部側に、
該開口部に連続する逃がし溝を設けたことを特徴とする
打撃装置におけるタガネ用ガイドブツシユの取付構造で
ある。The guide bush mounting structure of the present invention, however, comprises a cylinder having a built-in piston driven by fluid pressure, and a front cap mounted at the bottom of the cylinder for reciprocally holding the chisel, and the piston is used to secure the chisel. In a striking device for striking and crushing objects to be crushed, a guide bush for guiding the chisel is removably fitted into a mounting hole provided in the front cap, and is retained in a pin hole formed in the front cap. A pin is inserted, and the retaining pin is engaged with a pin groove having a semicircular cross section provided on the outer peripheral portion of the guide bush, and a relief groove continuous with the pin groove is formed at least on the upper side of the pin groove. Provided, at least on the lower side of the opening formed by opening the pin hole on the inner wall surface of the mounting hole,
It is a mounting structure for a guide bush for chisel in a striking device, characterized in that a continuous escape groove is provided in the opening.
この考案のガイドブツシユの取付構造における作用を、
この考案の一実施例を示す第６図により説明すると、打
撃装置の使用中の振動や衝撃あるいはタガネ５との摩擦
力により、ガイドブツシユ６ａが第６図に矢印Ｘで示す
ように下向きの力を繰返して受けると、抜止めピン８ａ
を介しての繰返打撃により、ガイドブツシユ６ａのピン
溝１１ａの上縁部１５およびフロントキヤツプ４の開口
部１３ａの下縁部１６が矢印Ｙで示す突出方向に塑性変
形するが、この変形は逃がし溝１２ａおよび１４ａ内に
突出するだけで、ガイドブツシユ６ａの外径あるいは取
付穴７ａの内径を越えて突出し他部材に強圧されること
が防止される。従つて抜止めピン８ａを押出してピン溝
１１ａとの係合を解けば、ガイドブツシユ６ａはフロン
トキヤツプ４から容易に引出すことができ、新しいガイ
ドブツシユ６ａも過大な押込力を必要とすることなくフ
ロントキヤツプ４内に挿入することができる。The operation of the mounting structure of the guide bush of this invention,
Referring to FIG. 6 showing an embodiment of the present invention, the guide bush 6a generates a downward force as indicated by an arrow X in FIG. 6 due to vibration or impact during use of the striking device or frictional force with the chisel 5. When repeatedly received, the retaining pin 8a
By repeated impacts through the pin, the upper edge 15 of the pin groove 11a of the guide bush 6a and the lower edge 16 of the opening 13a of the front cap 4 are plastically deformed in the protruding direction indicated by the arrow Y, but this deformation is released. Only by protruding into the grooves 12a and 14a, it is possible to prevent the protrusion from exceeding the outer diameter of the guide bush 6a or the inner diameter of the mounting hole 7a and being strongly pressed by other members. Therefore, if the retaining pin 8a is pushed out to disengage the pin groove 11a, the guide bush 6a can be easily pulled out from the front cap 4, and the new guide bush 6a does not require an excessive pushing force. 4 can be inserted.
以下第１図乃至第６図によりこの考案の第１実施例を説
明する。A first embodiment of the present invention will be described below with reference to FIGS.
図中、１は打撃装置で、ピストン２を内蔵するシリンダ
３の下部にフロントキヤツプ４を連結し、このフロント
キヤツプ４内にタガネ５の上部を摺動自在に保持して成
る。シリンダ３は油圧源に接続され、ピストン２は切換
弁などの公知の手段を介して油圧によつて往復駆動さ
れ、タガネ５の頂部がピストン２により打撃され、この
打撃力が岩石やコンクリートなどの被破砕物に伝達され
破砕作業がおこなわれるようになつている。６ａおよび
６ｂはガイドブツシユで、ガイドブツシユ６ａはフロン
トキヤツプ４に穿設した上下方向に延びる取付穴７ａ内
にすきまばめの状態で挿入され、ガイドブツシユ６ｂは
同様に取付穴７ａより小径の取付穴７ｂ内にすきまばめ
の状態で挿入されている。８ａは下側のガイドブツシユ
６ａのフロントキヤツプ４に取付けるための２本の抜止
めピンで、第２図に示すようにフロントキヤツプ４にタ
ガネ５の軸線と直角方向に向うように穿設したピン穴９
ａに、すきまばめの状態で挿入され、スプリングピン１
０により脱落が防止されている。一方ガイドブツシユ６
ａの外周面には、抜止めピン８ａの中央部に係合する断
面半円状（詳しくは溝中央部における断面が半円状）の
ピン溝１１ａが２個所設けられ、抜止めピン８ａは少量
のすきまをもつてこのピン溝１１ａに係合するようにな
つている。１２ａはガイドブツシユ６ａの外周面に設け
た逃がし溝で、第３図および第４図に示すように、ピン
溝１１ａの上下中心部から上側にかけて、かつピン溝１
１ａの長さよりやゝ広い範囲にわたつて、浅い帯状に設
けられている。一方フロントキヤツプ４に穿設したピン
穴９ａは、第５図に示すように取付穴７ａの内壁面に開
口して、抜止めピン８ａが突出するための開口部１３ａ
を形成するが、この開口部１３ａの上下中心部から下側
にかけても浅い帯状の逃がし溝１４ａが、取付穴７ａの
内壁面に設けてある。逃がし溝１２ａおよび１４ａの深
さＴ（第６図参照）は、抜止めピン８ａの直径寸法にも
よるが、0.5〜１mm程度とするのがよい。一方８ｂは、
上側のガイドブツシユ６ｂをフロントキヤツプ４に取付
けるための２本の抜止めピンであるが、その挿入用のピ
ン穴、ピン溝、およびこれらに連続する逃がし溝等は、
ガイドブツシユ６ａ用のと同一構造を有するので、相当
部分に添付号ａの代りにｂを付した符号で図示し、その
詳細な説明は省略する。また２０はタガネの抜止め用の
ピンであり、２１はこのピン２０に係合するようにタガ
ネ５に設けた切欠である。In the figure, reference numeral 1 is a striking device, which is formed by connecting a front cap 4 to the lower part of a cylinder 3 containing a piston 2 and slidably holding an upper part of a chisel 5 in the front cap 4. The cylinder 3 is connected to a hydraulic pressure source, the piston 2 is reciprocally driven by hydraulic pressure through a known means such as a switching valve, and the top of the chisel 5 is struck by the piston 2, and this impact force is applied to rocks, concrete, etc. The crushing work is carried out by being transmitted to the object to be crushed. Reference numerals 6a and 6b are guide bushes, and the guide bush 6a is inserted into a vertically extending mounting hole 7a formed in the front cap 4 with a loose fit, and the guide bush 6b is also in a mounting hole 7b having a smaller diameter than the mounting hole 7a. It is inserted with a loose fit. Reference numeral 8a designates two retaining pins for attaching to the front cap 4 of the lower guide bush 6a. As shown in FIG. 2, a pin hole is formed in the front cap 4 in a direction perpendicular to the axis of the chisel 5. 9
It is inserted in a with a loose fit and spring pin 1
0 prevents falling off. Meanwhile, guide bush 6
On the outer peripheral surface of a, two pin grooves 11a having a semicircular cross section (specifically, the cross section at the groove center is semicircular) that engages with the central portion of the retaining pin 8a are provided at two locations. The pin groove 11a is engaged with a small clearance. Reference numeral 12a denotes a relief groove provided on the outer peripheral surface of the guide bush 6a. As shown in FIGS. 3 and 4, the pin groove 11a extends from the vertical center to the upper side and the pin groove 1a.
It is provided in a shallow strip shape over a range slightly wider than the length of 1a. On the other hand, the pin hole 9a bored in the front cap 4 opens to the inner wall surface of the mounting hole 7a as shown in FIG. 5, and the opening 13a for the retaining pin 8a to project.
However, a shallow strip-shaped escape groove 14a is provided on the inner wall surface of the mounting hole 7a even from the upper and lower central portions of the opening 13a to the lower side. The depth T of the escape grooves 12a and 14a (see FIG. 6) is preferably about 0.5 to 1 mm, though it depends on the diameter of the retaining pin 8a. On the other hand, 8b is
There are two retaining pins for attaching the upper guide bush 6b to the front cap 4, but the pin hole for inserting the pin, the pin groove, and the relief groove continuous to these are
Since the guide bush 6a has the same structure as that for the guide bush 6a, the corresponding parts are shown by reference numerals with b in place of the attached number a, and detailed description thereof will be omitted. Further, 20 is a pin for preventing the chisel from coming off, and 21 is a notch provided in the chisel 5 so as to engage with the pin 20.
上記構成のタガネのガイド構造においては、打撃装置使
用中の振動や衝撃あるいはタガネ５との摩擦力により、
ガイドブツシユ６ａが第６図に矢印Ｘで示すように下向
きの力を繰返して受けると、抜止めピン８ａを介しての
繰返打撃により、ガイドブツシユ６ａのピン溝１１ａの
上縁部１５およびフロントキヤツプ４の開口部１３ａの
下縁部１６が矢印Ｙで示す突出方向に塑性変形するが、
この変形は逃がし溝１２ａおよび１４ａ内に突出するだ
けで、ガイドブツシユ６ａの外径あるいは取付穴７ａの
内径を越えて突出し他部材に強圧されることが防止され
る。従つて抜止めピン８ａを***１７（第２図参照）側
から押出してピン溝１１ａとの係合を解けば、ガイドブ
ツシユ６ａはフロントキヤツプ４から容易に引出すこと
ができ、新しいガイドブツシユ６ａも過大な押込力を必
要とすることなくフロントキヤツプ４内に挿入すること
ができるのである。なおガイドブツシユ６ａには、打撃
装置使用中の振動等により、矢印Ｘと反対方向の上向き
の力もかかるが、ガイドブツシユ６ａの頂面あるいはつ
ば部２２の上面がフロントキヤツプ４に当接支持される
ので、ピン溝１１ａの下縁部および開口部１３ａの上縁
部には過大な力はかからず、その塑性変形量は少量であ
つてガイドブツシユ６ａの挿脱に影響を及ぼすものでは
ない。In the guide structure of the chisel having the above structure, due to vibration or impact during use of the striking device or frictional force with the chisel 5,
When the guide bush 6a repeatedly receives a downward force as indicated by an arrow X in FIG. 6, the upper edge 15 of the pin groove 11a of the guide bush 6a and the front cap 4 are repeatedly hit by the retaining pin 8a. The lower edge portion 16 of the opening 13a of the above is plastically deformed in the protruding direction indicated by the arrow Y,
This deformation only projects into the escape grooves 12a and 14a, and it is prevented that it projects beyond the outer diameter of the guide bush 6a or the inner diameter of the mounting hole 7a and is strongly pressed by other members. Accordingly, if the retaining pin 8a is pushed out from the side of the small hole 17 (see FIG. 2) and the engagement with the pin groove 11a is released, the guide bush 6a can be easily pulled out from the front cap 4 and the new guide bush 6a is too large. It can be inserted into the front cap 4 without requiring a pushing force. It should be noted that the guide bush 6a is also subjected to an upward force in the opposite direction of the arrow X due to vibration or the like during use of the striking device, but since the top surface of the guide bush 6a or the upper surface of the collar portion 22 is abutted and supported by the front cap 4, No excessive force is applied to the lower edge of the pin groove 11a and the upper edge of the opening 13a, and the amount of plastic deformation thereof is small and does not affect the insertion / removal of the guide bush 6a.
上側のガイドブツシユ６ｂの抜止めピン８ｂによる取付
部においても同様な作用効果が得られる。Similar effects can be obtained in the mounting portion of the upper guide bush 6b by the retaining pin 8b.
この考案は上記実施例に限定されるものではなく、たと
えば第７図に示すように各逃がし溝１２（逃がし溝１２
ａおよび１２ｂの総称。以下他の部分についても同様に
総称する。）および１４は、ガイドブツシユ６および取
付穴７の全周にわたつて設けてもよい。また第８図に示
すように、逃がし溝１２をピン溝１１の下側にも設けた
り、逃がし溝１４を開口部１３の上側にも設けたりして
もよい。また上記実施例ではピン溝１１がガイドブツシ
ユ６の外周面の一部に、抜止めピン８に嵌合する直線溝
状に設けたが、第９図に示すようにガイドブツシユ６の
全周にわたつて環状のピン溝１１を設け、このピン溝１
１の一部に抜止めピン８を係合させるようにしてもよ
い。さらに抜止めピンのフロントキヤツプへの保持は、
スプリングピン１０以外の手段によりおこなうようにし
てもよい。The present invention is not limited to the above-described embodiment, and for example, as shown in FIG.
A generic term for a and 12b. Hereinafter, the other parts will also be collectively referred to. ) And 14 may be provided over the entire circumference of the guide bush 6 and the mounting hole 7. Further, as shown in FIG. 8, the escape groove 12 may be provided below the pin groove 11 or the escape groove 14 may be provided above the opening 13. In the above embodiment, the pin groove 11 is provided in a part of the outer peripheral surface of the guide bush 6 in the shape of a linear groove that fits into the retaining pin 8. However, as shown in FIG. 9, the pin groove 11 extends over the entire circumference of the guide bush 6. An annular pin groove 11 is provided, and this pin groove 1
The retaining pin 8 may be engaged with a part of 1. In addition, retaining the retaining pin on the front cap is
It may be performed by means other than the spring pin 10.
以上説明したようにこの考案によれば、ガイドブツシユ
のピン溝の上縁部およびフロントキヤツプのピン穴の開
口部の下縁部における塑性変形によりガイドブツシユと
フロントキヤツプが固着することが防止され、ガイドブ
ツシユの交換を容易におこなうことができる。As described above, according to the present invention, the guide bush and the front cap are prevented from sticking to each other due to plastic deformation at the upper edge of the pin groove of the guide bush and the lower edge of the opening of the pin hole of the front cap, and the guide bush is fixed. It can be easily exchanged.
第１図乃至第６図はこの考案の第１実施例を示し、第１
図はタガネのガイド構造部の縦断面図、第２図は第１の
Ａ−Ａ線断面図、第３図は同じくＢ−Ｂ線断面図、第４
図はガイドブツシユの斜視図、第５図はフロントキヤツ
プの部分縦断面（第１図のＣ−Ｃ線断面）図、第６図は
ガイドブツシユおよびフロントキヤツプの変形状態を示
す縦断面図、第７図はこの考案の第２実施例を示す第３
図相当図、第８図はこの考案の第３実施例を示す第１図
相当図、第９図はこの考案の第４実施例を示す第２図相
当図、第１０図および第１１図は従来のタガネのガイド
構造を示す縦断面図である。 １……打撃装置、２……ピストン、３……シリンダ、４
……フロントキヤツプ、５……タガネ、６ａ，６ｂ……
ガイドブツシユ、７ａ，７ｂ……取付穴、８ａ，８ｂ…
…抜止めピン、９ａ，９ｂ……ピン穴、１１ａ，１１ｂ
……ピン溝、１２ａ，１２ｂ……逃がし溝、１３ａ，１
３ｂ……開口部、１４ａ，１４ｂ……逃がし溝。1 to 6 show a first embodiment of the present invention.
The figure is a longitudinal sectional view of the guide structure portion of the chisel, FIG. 2 is the first sectional view taken along the line AA, and FIG. 3 is the same sectional view taken along the line BB.
FIG. 5 is a perspective view of a guide bush, FIG. 5 is a partial vertical cross-sectional view of the front cap (cross-section taken along the line CC in FIG. 1), FIG. 6 is a vertical cross-sectional view showing a deformed state of the guide bush and the front cap, and FIG. Shows a third embodiment of the present invention
FIG. 8 is a view corresponding to FIG. 1, showing a third embodiment of the present invention, and FIG. 9 is a view corresponding to FIG. 2 showing a fourth embodiment of the present invention. It is a longitudinal cross-sectional view which shows the guide structure of the conventional chisel. 1 ... Striking device, 2 ... Piston, 3 ... Cylinder, 4
…… Front cap, 5 …… Chisel, 6a, 6b ……
Guide bushes, 7a, 7b ... Mounting holes, 8a, 8b ...
... Prevention pins, 9a, 9b ... Pin holes, 11a, 11b
...... Pin groove, 12a, 12b ...... Escape groove, 13a, 1
3b ... Opening portion, 14a, 14b ... Escape groove.
Claims (1)
たシリンダと、このシリンダの下部に取付けられタガネ
を往復自在に保持するフロントキヤツプとをそなえ、前
記ピストンにより前記タガネを打撃して被破砕物の破砕
をおこなう打撃装置において、前記タガネをガイドする
ガイドブツシユを、前記フロントキヤツプに設けた取付
穴に挿脱自在に嵌込み、前記フロントキヤツプに穿設し
たピン穴に抜止めピンを挿入して、この抜止めピンを前
記ガイドブツシユの外周部に設けた断面半円状のピン溝
に係合させるとともに、前記ピン溝の少なくとも上部側
に、該ピン溝に連続する逃がし溝を設け、前記ピン穴が
前記取付穴の内壁面に開口して形成した開口部の少なく
とも下部側に、該開口部に連続する逃がし溝を設けたこ
とを特徴とする打撃装置におけるタガネ用ガイドブツシ
ユの取付構造。1. A crushed object, comprising a cylinder having a piston driven by fluid pressure, and a front cap attached to the lower part of the cylinder for reciprocally holding a chisel, wherein the chisel strikes the chisel. In a striking device for crushing, a guide bush for guiding the chisel is removably fitted into a mounting hole provided in the front cap, and a retaining pin is inserted into a pin hole formed in the front cap, The retaining pin is engaged with a pin groove having a semicircular cross section provided on the outer peripheral portion of the guide bush, and a relief groove continuous with the pin groove is provided at least on the upper side of the pin groove, and the pin hole is At least a lower side of the opening formed by opening the inner wall surface of the mounting hole is provided with a relief groove continuous with the opening. Mounting structure of chisel for Gaidobutsushiyu in the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11633288U JPH0632310Y2 (en) | 1988-09-02 | 1988-09-02 | Attachment structure of guide bush for chisel in striking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11633288U JPH0632310Y2 (en) | 1988-09-02 | 1988-09-02 | Attachment structure of guide bush for chisel in striking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0239889U JPH0239889U (en) | 1990-03-16 |
| JPH0632310Y2 true JPH0632310Y2 (en) | 1994-08-24 |
Family
ID=31358773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11633288U Expired - Fee Related JPH0632310Y2 (en) | 1988-09-02 | 1988-09-02 | Attachment structure of guide bush for chisel in striking device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0632310Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI119228B (en) * | 2006-12-05 | 2008-09-15 | Sandvik Mining & Constr Oy | Storage of tools in crusher |
-
1988
- 1988-09-02 JP JP11633288U patent/JPH0632310Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0239889U (en) | 1990-03-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |